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A Tip-Gap Meshing like Bilayer SERS Substrate for Highly Sensitive Detection

Liang Lv,  Junrong Li,  Wei Fang,  Aiguo Shen  and  Jiming Hu 

Abstract

Tips of noble metallic nanostructures and the gaps between closely packed noble metallic nanostructures are widely claimed as hot-spots for SERS sensing. A significant amount of effort and expertise have devoted into reformation and maximum utilization of the “tips” and “gaps”. However, most studies focus on the “tips” or the “gaps” separately. Here we report a novel SERS substrate that contains a particular meshing structure of curved-edged golden nanocubes (CENCs) and Au nanospheres (Au NSs), one of the tips of CENCs inserted into the gaps between three closely packed Au NSs. Meanwhile, a facile and time-saving novel protocol has been proposed to fabricate this meshing structure in the form of bilayer SERS substrate. The as-fabricated substrate exhibited extraordinary SERS sensitivity for malachite green (MG) and melamine attribute to the tip-gap meshing structure. The detection limit is as low as 10-12 M and 10-9 M, respectively.

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Publication details

The article was received on 12 Mar 2018, accepted on 05 Apr 2018 and first published on 05 Apr 2018


Article type: Paper
DOI: 10.1039/C8AY00530C
Citation: Anal. Methods, 2018, Accepted Manuscript
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    A Tip-Gap Meshing like Bilayer SERS Substrate for Highly Sensitive Detection

    L. Lv, J. Li, W. Fang, A. Shen and J. Hu, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C8AY00530C

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